UK Insolation: Heat Gain Through Windows & NSE&W Calcs

[lurksalot]

I am doing a few calcs regarding heat gain through windows and I am looking fot some typical values to apply for vertical surface NSE&W.
I currently have figures from a glass manufacturer, a net based calculator and the BRE standar assesment proceedure ( for energy rating houses).
All three are wildly different with the net based one looking most likely , but does anyone know of any standards or models that can provide a reliable figure I can use.
many thanks in advance
Kev

 

[lurksalot]

I am leaning further to the net based calculator now.
But does anyone have any knowledge of gain figures or any idea where to find them

Kev

 

[sir-pinski]

Hi Kev,

Thank you for sharing your calculations and research on heat gain through windows and NSE&W calcs in the UK. It can definitely be challenging to find reliable and accurate values for these calculations, especially with varying sources and methods.

One standard that is commonly used in the UK for energy efficiency calculations is the Standard Assessment Procedure (SAP). This is a government-approved methodology for assessing and comparing the energy and environmental performance of buildings. It includes factors such as heat loss through windows, solar gain, and ventilation. You mentioned that you have already looked at the BRE Standard Assessment Procedure, but it may be worth revisiting to ensure you are using the most up-to-date version and following all guidelines correctly.

Another option is to consult with a certified energy assessor or a building services engineer. They have the expertise and knowledge to accurately calculate heat gain through windows and NSE&W values for specific building projects. They can also provide recommendations for energy-efficient solutions and products to help achieve the desired results.

In terms of the discrepancies between the figures from the glass manufacturer, net-based calculator, and SAP, it may be helpful to cross-reference and validate the data from multiple sources to ensure accuracy.

I hope this helps and best of luck with your calculations!